Mower teeth sharpener



Jam.v 15, 1952 A w, RINNE 2,582,607

MOWER TEETH SHARPENER Filed Dec. 28, 1949 sa Vl IM S. 5

/az 2e o o faz-Z En O l/ I Gttomeg Patented Jan. 15, 1952 enr f oFF ice lzfsszor AugustrWkRinne, Steinauer, Nebr.

Application December-"28, 19'49, SerialNo1`35353 zmlaims. (crmsay Thisnvention'relates top'owel*'.aoti-iatedflgrln'dQ-i-y ing'. machines-'lof'. the :type used for.sharpen-1n?'gr tools; More:fparticularlyzitlisivanfobject '.otzthislinvention to.'- 'provide means i. for sharpeninglzthel bladesfiof a"- .mower- 'without-removingl-the :bladesfromithecutterlbarof thefmoweri The" cutteribar orf' sicklef element 015i mowers; binders#andthe'llike.-travelsfeomparativelyfclosel to.. the ground: where:` itlf' strikes.. stones.. small` stumps -andmtliervobi eetsf, .sotthat-'it suu'ectedi tof*considerable-.abuse;.and therefore-:the blades: or ."seetinns` .thereof irequirefsharpeninglcompara^ tivelyxoftem Theaahladesuarefrivetedvitorthelbar.;

necessary.' to ilcutthe rivetsfrwithlia :chisel driven by-razihammer::blomnandzthe:blow ottheshammerr often @breaksithebladesw It is;` .therefore,z,.a,1rf objection thisiz'inventionnto: provides. an. -veshapeds grinding? wheel .'adaptedtol" enterfthelopening between twol bla-destof aisickle. barzandffin:combinationiwitlrimeans fora'ctuatingf th'egrindingfwheellandtin combnatiorrwitliiiother; means rfor'Jmovingtheffsiokle:fbarrintoapositionfor; grinding tthe 'adjacentzsidesuofimpairfoffteetlnon thefcutter ,'bar, theaconstruc'tion beingsuclrfthati the wheel entersi ther '.openingebetweeni:eachzpair: of blades and grindstheacutting;edgessrthereof:

Another object soflthezinventionjsto provide: a guide' rail. forislidablyn ande pivotallyluisupporting abracket for.afmowermutterbarzf. l

Still-i another-'objectief tor; provideaaii devicetas." described',., the bracket member.I of;.;whi'ch:. has'. meansrfor: readily securingi .a icutteitf'bar: tliereto and. also. hasraadetent uneansfor stopping theater@ Wardr movementfof .thef bracket Von itsry pivotal; mountingi.

Furtherobects 'of fthe'inventiorrrare torprovider afdevice as` described havingitliegrinding'wheeh thereof s pivotally,rv mounted.; fori controlling:-

amountoffgrindingtozbedonegxand havingmeans1- for fholdingethe .Wheel :awamfrom ithe'. cutting bar: inaretractedfposition'whennotin use."

Yet vanotherf vobject tof thefinventionrais'zstoiproavideua I device: for fthe purposes described "which eiiicient' -in aoperationyand :relatively siinpleliiand.y` inexpensiveY to manufacture; lassemble and utililrerv Otherfandistll :further .nbj ectsandiia'dvantages" ot :thefinvention's will .fbgecomez apparent ffi'onilthe:I following; detail-ed '.descriptionrofa preferred-'eme bodiment thereof..

In fthedrawings Figurefluisza" top,` planzview :of-5 thefanewifdevicaf having certainpnrtions; thereoifbroken away fen convenienceof illustration:

'Eig'.uref2T-i's la side elevation ofthenew device;v attachedV to a .portion of :aworkvbench 'andhaving the cutter'fbar 'andtth'e grindingiwheel'positioned` for fgrindingl Y Y.

Figure 3 is a frontal elevation of tliedevicewith' the` cutter bladenot fshown; certain' other portions 1 beingl broken'.;.away for conveniencef of illustrationLr The Sharpener; oil this. invention" includes u a platforml or@ standf ItU-rhavingzoppositely .disposed downwardly-- extending iside tfwallsforlrails L. I 2z and I 4.: As :best/f shown inlFi'gu-re: 2; .the .platform :I Il' is secured to albencli' I6byioneorfmoreibolt and nut assemblies=.I81.i

As seeniniFigureiBl, rails .I Ziand': lisupport two downwardly extending spaced apartparallel'farms oripo'stsf-.zli and: 22 l which: are. held apart by. a support bar 24.for'apurposesalaterldescribed;-

Armerina-'body'. orfzleverzporti'on. 2.6,5'which prof. vides a-.swinging frame". is I. provided. 'having ."tWo spacedeapartparallel rails of channelnironrof L". shapexin cross Vseetiong.havingltop portions 28 and '3llv and Isidef portions 32 and 3l respectively,v and being held apart by twormetal v strapslandl 38 'suitably-fattached"to'lthef-undersu-rfaces 'ofiithe portions. 28` 'and 30f'at`theends of the latter.

Two@ apertures'-g aref..p'rovidedii atv the.V rearward ends of the side portions 32 and 34 in axial alignmentf-with each'=other`.'- vTwo likelra'perture's are provided' in:` thesides I2'and" I41l for receiving therethrough pivot bolts I4 Ilg for.A pi-votallyl attachingthefmainf body portion 26Stdl .the `platform I Il'.

A hand1e'142 Ais suitablyattaeliedat' its rearward end to the-portion .28fby1boltsl 44, and thelh'andle extends upwardly-fand forwardly any4 desired distanceffor obtainingasubstantial amountoflever# age to move= ythe mainbody portiondownward1y tolltlfefpositiorr shownirrFigure 2? A control arin46 is=attached"`to :the `portion 30- and i`s=securedrat itsl'forwa'rd endpor'tion by'bolts 4`8-`to vfthe| 'topV channel-iron portion `3ll`=`and extends upwardly-l andl rearwardly* therefrom. y The extreme-rearward end portionl'is'theri bent down-ik wardly.: vinto approxixnfate'v parallelismr4 with the platform 'I Dfoi" receiving-therethrough atli'readed efy`e-'bo1t?52. I

Knut-'54- th'readedl'y) secured to the eye-bolt 52? onfth'elvupper end thereof'for vadjusting' purposesflater'describedv i The eyef56-of theeeyeebo'lt lhasa-hook'iof tliecoil springf'llf disposed theretlirougl'i.V The opposite end of the spring 60 is provided-with a like-:Hook 62 receivedtlrou'glif the veye of vari eyebolt 64 anchored y"teli-ther platformf |01 directly belowthelfeyeeboltffszfias bestfseenrlin Figureilzf! The nut 54 can be turned in a proper direction for causing the distance between the eye 56 and the bolt 64 to be lengthened; the spring 60 then pulls downwardly on the arm 46 causing the lever portion 26 to move in the direction of the arrow A, to a retracted position.

'I'he upward movement of the lever portion 26 is restricted by a detent bolt 68, best seen in Figure 3, suitably attached to the platform at the forward end ithereof and extending upwardly through an elongated opening in the portion 30 of the main body portion 26. The

head of the bolt 68 is larger than the width of the detent bolt 68.

Two pillow blocks '|4 and 16 are located at the forward end and outer edges of the main body portion 26 and are suitably attached to themembers 28 and 30 respectively by means of bolts '|8.` The pillow blocks are in axial alignment for rotatably.V supporting a shaft 80.y The outer end portions 82 and 84 of the shaft 80 are provided with threads thereon for purposes later described. A

A pulley wheel 86 is attached to the end portion 84 of the shaft 80 adjacent, but not touching, the side 32 of the main body portion 26.

A grinding wheel 88, having a V shaped outer surface is disposed on the end portion 88 against the outer surface of the pulley wheel 86. A locking washer 90 and a nut 92 hold the grinding wheel 88 rigidly to the shaft 30.

A lock disk 84 is threadedly attached to the end portion 82V against the bearing 14 and is held in place by a nut 96.

A support bracket or shelf |00, approximately Z shaped in cross section is disposed against the arms 'and22. The support |00 has a downwardly extending portion |02, having at least two apertures. The arms 20 and 22 ofthe new device have corresponding apertures for receiving bolts |04 to attach the support member |00 to the arms 20 and 22.

Parallel to, and forwardly of the .portion |02 v'change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myselfto the precise arrangement and formation A` .of the Aseveral parts herein shown in carrying out my invention except as claimed.

is an upwardly extending bracket portion |04 for slidably and pivotally mounting a bar guide The bar guide |06 is composed of a piece of angle iron having side arms |08 and l0. Spaced equidistantly along the rearward surface of the arm |08 and attached thereto are al plurality of L-shaped members ||2. The upper end portions ||4 of the L-shaped members ||2 are pointed for purposes vlater described. The lower end portions ||6 of the members ||2 are bent rearwardly forming V shaped openings I8 between the lower end portions ||6 and detent straps |20 disposed onvthe opposite side of the arm `|08 in alignment with the members ||2.

Bolts |22 are disposed through the straps |20, the armV |08and the members ||2 for attaching said members I2 and straps |20 to the arm |08. Attached to the upper surface of the arm l|0 by means of b olts |26 are a plurality of spaced apart angle iron braces |24. An end |28 of each brace |24 is turned upwardly in parallelism` with the upper end portionV |`|4 of a member ||2. Openings are formed between the ends or guides |28 and upper end portions or guides ||4 for receiving a cutter bar |30 having a plurality lof teeth |32. Y

The shaft 80 is rotated-by means of a driven belt |40 shown in dotted lines in Figure 1. The cutter bar |30 can be moved.endwise into a l Ivclaim:

l. In a cutter bar blade Sharpener, the combination vwhich comprises a horizontally vdisposed platform having side rails adapted to be positioned onrthe uppersurface of a work bench and havingvertically disposed posts on the outer ends of said railsfa vertically swinging horizontally disposed frame positioned above the platform and also having spaced side rails, means pivotally attachingl the vside rails of the frame to the side rails of the platform providing the vertical swinging action of the frame, an upwardly inclined arm carried by the frame, a spring connecting the extended end of the arm to the platform, a shaft journaled on the said swinging frame, a grinding wheel having a V-shape peripheral surface carried by the shaftfa shelf mounted on the said posts, extended outwardly therefrom, and positioned parallel to the axis of the said shaft, .an angle iron bar. guide having two arms and mounted on the outer" edge of the shelf and positi'oned with one arm inclined upwardly and inwardly from the outer edge .of the shelf, and spacedguide members extended upwardly and inwardly from the said bar guide, said guide members being spaced to receive a cutter bar and positioned whereby cutting edges of blades carried by thev cutter bar. are inclined inwardly for engagement with the grinding wheel.

.2.*Inl'a cutter` bar blade Sharpener, the combinationwhich comprises a horizontally disposed platformy having side rails adapted to be positioned on the upper surface of a work bench and having vertically disposed posts on the outer ends of Vsaid rails, a vertically swinging horizontally disposed frame positioned above the platform and also having spaced side rails, means pivotally attaching the side rails of the frame to the side railsof the platform providing the yvertical swinging mounting of the frame, an upwardly inclined arm carried by and extended from the inner end of the frame, a spring connecting the extended end ofthe arm .to the platform, a shaft journaled on thevsaid* swinging frame, a grinding wheel having a 'V-shape peripheral surface carried'iby :the shaft, a pulley on the said shaft, an elongated shelf .Z-shape in cross section mounted on the said posts and positioned parallel to the axis of thesaid shaft, said'shelf having an upwardly extended flange on the outer edge, an

angle iron bar guide positioned on the flange on inclined arm of the bar guide for retaining a cutter bar with blades thereon positioned to engage the grinding wheel, one of said guideshaving 5 tapering sides providing a point for positioning the blades in registering relation with the grinding wheel, and a handle extended from the swinging frame whereby the frame is drawn down wardly to bring'the grinding wheel into engagement with the blades.

AUGUST W. RINNE.

REFERENCES CITED The following references are of record in the le of this patent:

Number 6 UNITED STATES PA'IYENTS Name Date Custard Oct. 26, 1886 Smithson et al Feb. 11, 1919 Ehrlinger Mar. 18, 1930 Henderson July 26, 1932 Beeler May 20, 1947 Greeley Dec. 21, 1948 Coffeen Oct. 25, 1949 

